Saw-teeth



York, haveinvented certain Improvements in Maholding-screw, '11', passing through slot d in the front intent y Qtyiiiire.

WILLIAM ULEMSON, 0F MIDDLETOWN, `NEW YORK.

. Letters Ratent No. 104,830, dated J une 2S, 1870.

Moory MACHINEFR G-RNDING- 'SAW-TEETH.

The Schedule'referred y'to in these Letters Patent and making part of the same To whom it 'may concern:

Be it known that I, VILLIAM lCt.1-:.\Iso.\, of Middletown, in the county of Orange, in the State of N ew chines for Grinding the Teeth ot Saws, of which the following isa speciiica-tion. Y

In the drawingv Figure 1 is a side elevation ot' the machine;

Figure 2 is a top plan view oi' the same; and

Figure 3 is a front view ot' the adjustable table.

The teeth ot' common cross-cut saws, after heilig out at right angleswith the plate, have to be ground to a definite shape, and, as every alternate tooth is set to cut or score the-wood on opposite sides of the ker, the edges ot' the teeth must have a certain bevel, and to grind the teeth to the, required shape and bevel, and have the machine capable of such adjustment as that different sizes 0f teeth-having dit'- ferent 'angles with relation to the line of the cuttingpoints thereof', and having` dilerent bevels upon their edges, is the object of this invention; and

It consists in the construction and arrangement ot the partsthat eiect the object above named.

A is the frame that supports the operating parts.

B is the usual beveled-edge grinding-wheel, securely and centrally Illing ou a shaft that may. turn in bearings that are attached `to frame A, and revolved, in the usual way', by lneans of a driving-pulley on the shaft.

C is an adjustable table, that can be raised or lowered, and held at any desired height by means of a .piece D of said table, as seen in dotted lines in fig. 1. On the topof table C is a sliding metal plate, C', which has slots C cut therein, in such manner that said plate may-be adjusted 'toward or i'om grindingwheel B, and' is held in any desired position by the holding-screws c'.

This plate slides between two parallel ways,a a, made fast on the top of table C by the screws a' a.

'.lhe table and pla-te are cut away at their forward edges, to admit the edge of grimling-wheel `B to the proper position.

Attached to the forward edge of plate C', and at either side of the grinding-wheel, is a stop-gauge, c", against whichthe pointsl of the teeth are stopped when the, grinding is complete on that tooth.

At one side of the grinding-wheel, and attached to the stop-gauge c", isl an adjustable guide or stop, c, hold in any desired position bythe holding-screw e.

Guide e is attached to the top of' stop-gauge c", and bent forward'and down nearly to the top of plate C', as seen in fig. l in dotted lines.

When table C is adjusted at the right height to give the proper bevel tothe edges of the teeth, and the stop-gauge 4c" to give the proper depth, and stop g c in the right position,'thc saw E, seen in fig. 2 in dotted lines, is placed on the table C iu such position that an edge of a tooth will comeI in contact with the beveled side of the grinding-wheel, the saw is advanced toward the grinding-wheelto grind away the edge of thc tooth .until the points of the teeth strike against the stop-gauge c", and the opposite edge of the tooth, beingground, will strike the guide-,stop e, and the edge .ot' that toothis ground to the proper angle and bevel.

lrocecd in this way until one edge of all the teeth to be ground on that side is finished in` the same manner, when the guide-stop e is adjusted so that the opposite edges ci the same teeth will be ground upon the other 'angle of the grinding-wheel; then turn the saw the other side up, and grind the teeth that set to the other side of the saw in lthc salue manner, when the teeth will all be ofthe same size, and have the saine angle and bevel.

Saws of this character sometimes have every third or fifth tooth shorter than the others, for the purpose of making t-he short teeth clearing or planing-teeth, to clear the kei-f of the sawdust, and such teeth have no set, and their edges are ground at right angles to the plate.

Such teeth can be perfectiyground on this machine by letting table C 'downso that the saw will-beat the same height with the center of the grindingwheel, and, by raising said table O up, as seen in dotted lines in lig. 1,.an'd adjusting pla-te C with stopgauge c forward, a very acute bevel will be ground on the edges of thevte'eth, which', at times, is very desirable, and the want of a machine with such adjustineut'has long been felt, but thiswill accomplish the object sought.-

lhe machine is simple in construction and operation, cheap, and durable, and not liableto get out of order. l A

Having thus described my invention,

What I claim, and desire` to secure by Letters Patent, is-

" 1. The sliding adjustable plate having stop; gauge c and guide e, constructed in the, manner and i'or the purpose described.

2. The sliding adjustable plate. G', having vstopgauge c" and guide e, in combination with the adjustable table C, in the manner and for the purpose described.

3. rlhe adjustable table C, having sliding plate C', stops c" and e arranged thereon, in combination with the grinding-wheel 13,-in the manner described.

WM. CLEMSON.l

Witnesses:

Emsrm I?. WHEELER, i. R. KIMBALL. 

